[Perf] Linux/arm64: 4 Improvements on 7/21/2026 10:38:26 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [c39c3f371a1542dc1442a244bba117fb4e762299](https://github.com/dotnet/runtime/commit/c39c3f371a1542dc1442a244bba117fb4e762299)
Compare | [df8fb5a9d9b7f38bab55d67bf8b25e442b77169c](https://github.com/dotnet/runtime/commit/df8fb5a9d9b7f38bab55d67bf8b25e442b77169c)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c39c3f371a1542dc1442a244bba117fb4e762299...df8fb5a9d9b7f38bab55d67bf8b25e442b77169c)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in Microsoft.AspNetCore.Server.Kestrel.Performance.PipeThroughputBenchmark

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

• [Parse_ParallelAsync - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 1590.57 ns | 636.36 ns | 0.40 | 0.70 | False | | |
|

• [Parse_SequentialAsync - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 516.93 ns | 310.46 ns | 0.60 | 0.45 | False | | |
|

• [Parse_SequentialAsync - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 496.74 ns | 313.52 ns | 0.63 | 0.45 | False | | |
|

• [Parse_ParallelAsync - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 3.61 μs | 3.29 μs | 0.91 | 0.68 | False | | |

![graph]()
![graph]()
![graph]()
![graph]()
[Test Report]()

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'Microsoft.AspNetCore.Server.Kestrel.Performance.PipeThroughputBenchmark*'
```

### Microsoft.AspNetCore.Server.Kestrel.Performance.PipeThroughputBenchmark.Parse_ParallelAsync(Length: 128, Chunks: 16)

#### ETL Files

#### Histogram

#### JIT Disasms

### Microsoft.AspNetCore.Server.Kestrel.Performance.PipeThroughputBenchmark.Parse_SequentialAsync(Length: 4096, Chunks: 16)

#### ETL Files

#### Histogram

#### JIT Disasms

### Microsoft.AspNetCore.Server.Kestrel.Performance.PipeThroughputBenchmark.Parse_SequentialAsync(Length: 128, Chunks: 16)

#### ETL Files

#### Histogram

#### JIT Disasms

### Microsoft.AspNetCore.Server.Kestrel.Performance.PipeThroughputBenchmark.Parse_ParallelAsync(Length: 4096, Chunks: 16)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

Start with the benchmark source at src/benchmarks/micro/libraries/System.IO.Pipelines/PipeThroughputBenchmark.cs, focusing on the listed Parse_ParallelAsync and Parse_SequentialAsync cases. Run the provided benchmarks_ci.py command and compare the reported results with the linked baseline and test commits. Done means identifying and addressing the performance behavior, with benchmark results showing the expected improvement.

Written by the indexing model from the issue text.